Общий каталог Yamawa 2022 - 2023 - страница 1162

Предыдущая страница Следующая страница

Навигация

Length of engagement Length of engagement

■Length of engagement 4) Engagement length

Unit : mm

Thread tolerance class is chosen in consideration of "engagement classification" and "engagement length". To realize the stable tapping, it is呼びピッチSN L呼びピッチSN L
necessary to fully understand the relation between these factors and to choose the suitable tolerance class.
M10.25S≦0.60.6＜N≦1.71.7＜LM101.5S≦55＜N≦1515＜L
On "engagement classification: middle", the tolerance class 6H is almost always chosen for standard internal threads. However, in case of "engage-M10.2S≦0.50.5＜N≦1.41.4＜LM101.25S≦44＜N≦1212＜L
ment length : L", tolerance class 7H can also be chosen.M1.10.25S≦0.60.6＜N≦1.71.7＜LM101S≦33＜N≦99＜L
M1.10.2S≦0.50.5＜N≦1.41.4＜LM100.75S≦2.42.4＜N≦7.17.1＜L
On M12x1.75, the tolerance of 7H is 25% (50μm) larger than that of 6H. And this widens the selection range of the tolerance class for taps toM1.20.25S≦0.60.6＜N≦1.71.7＜LM111.5S≦55＜N≦1515＜L
customer's advantage.
M1.20.2S≦0.50.5＜N≦1.41.4＜LM111S≦33＜N≦99＜L
M1.40.3S≦0.70.7＜N≦22＜LM110.75S≦2.42.4＜N≦7.17.1＜L
【M12x1.75】
6H Pitch diameter : 10.863 ~ 11.063mm (tolerance 0.200 mm) M1.40.2S≦0.50.5＜N≦1.41.4＜LM121.75S≦66＜N≦1818＜L
7H Pitch diameter : 10.863 ~ 11.113mm (tolerance 0.250 mm) M1.60.35S≦0.80.8＜N≦2.62.6＜LM121.5S≦5.65.6＜N≦1616＜L
M1.60.2S≦0.50.5＜N≦1.51.5＜LM121.25S≦4.54.5＜N≦1313＜L
M1.80.35S≦0.80.8＜N≦2.62.6＜LM121S≦3.83.8＜N≦1111＜L
1) Engagement classification
M1.80.2S≦0.50.5＜N≦1.51.5＜LM142S≦88＜N≦2424＜L
classificationapplication
fineprecise screw threads with a little allowance
middlestandard screw threads used for machines, apparatuses and constructions bodies
coarsescrew threads used for construction and building installation, and screw threads for which threading operation is very difficult such as threading of hot rolled steel bars.

M2 0.4 S≦1 1＜N≦3 3＜L M14 1.5 S≦5.6 5.6＜N≦16 16＜L

M2.50.45S≦1.31.3＜N≦3.83.8＜LM162S≦88＜N≦2424＜L
M2.50.35S≦0.80.8＜N≦2.62.6＜LM161.5S≦5.65.6＜N≦1616＜L
2) Classification of engagement lengthM30.5S≦1.51.5＜N≦4.54.5＜LM161S≦3.83.8＜N≦1111＜L
symbolclassifiicationlimit sizeengagement length
Sshortup to and including 2.24Pd0.2
Nnormalover 2.24Pd 0.2up to and including 6.7Pd 0.2
L on rule of inter on rule of the t engagement length lassification fine nce positionlon nal thr oleran S 4Hg eads an ce class H N 5Hover 6.7Pd0.2 d external threads of internal threads L 6Hd : size designationめねじ おねじ external thread internal thread
middle coarse5H -6H 7H7H 8HP : pitch
M3.50.6S≦1.71.7＜N≦55＜LM171S≦3.83.8＜N≦1111＜L
M3.50.35S≦11＜N≦33＜LM182.5S≦1010＜N≦3030＜L
M40.7S≦22＜N≦66＜LM182S≦88＜N≦2424＜L

M4.5 0.75 S≦2.2 2.2＜N≦6.7 6.7＜L M18 1 S≦3.8 3.8＜N≦11 11＜L

M81.25S≦44＜N≦1212＜LM243S≦1212＜N≦3636＜L
M81S≦33＜N≦99＜LM242S≦8.58.5＜N≦2525＜L
Selection rule of the tolerance class of external threads
M80.75S≦2.42.4＜N≦7.17.1＜LM241.5S≦6.36.3＜N≦1919＜L
tolerance positionhg
engagement length engagement classificationSNLSNL
fine(3h4h)4h(5h4h)---
middle(5h6h)6h(7h6h)(5g6g)6g(7g6g)
coarse----8g(9g8g)

Technical Inf